to be powered on; to be turned on
emergency power supply; backup power; emergency power source
vehicle-mounted electricity generator (e.g. for filming, emergencies, etc.); power-generating railway car (e.g. for air-conditioning on a non-electric train)
external power source; external power supply
power supply unit; PSU; power module
power light; power indicator
development of electrical power resources
electrical outlet; wall socket; electrical power
loss of power; power outage; blackout
uninterruptible power supply; UPS
Electric Power Development
power disconnected (state)
standby power supply; backup generator
switched-mode power supply; switching regulator